CN106301518B - Signal processing method and device under GSM system - Google Patents
Signal processing method and device under GSM system Download PDFInfo
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- CN106301518B CN106301518B CN201610737759.7A CN201610737759A CN106301518B CN 106301518 B CN106301518 B CN 106301518B CN 201610737759 A CN201610737759 A CN 201610737759A CN 106301518 B CN106301518 B CN 106301518B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
- H04B7/0825—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with main and with auxiliary or diversity antennas
Abstract
The present invention relates to the field of communications, and in particular, to a signal receiving method and apparatus in a GSM system. The method and the device are used for solving the problems that in the prior art, a user terminal is low in signal receiving sensitivity in a GSM system, low in communication capacity in a weak signal environment and poor in call quality. The method comprises the following steps: in the process that the user terminal receives signals in the GSM system, when the user terminal determines that the signal strength of a first signal received by the main set antenna does not exceed a set threshold, the diversity antenna switch is turned on, the user terminal receives a second signal on a preset frequency band for receiving the first signal through the diversity antenna, and the user terminal combines the first signal and the second signal to obtain a complete received signal. Therefore, the signal receiving sensitivity of the user terminal in a GSM system is effectively improved, the communication capacity and the communication quality of the user terminal in a weak signal environment are enhanced, and the utilization rate of components is improved.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a signal processing method and apparatus in a GSM system.
Background
With the emergence of Long Term Evolution (LTE), high-speed internet access rate brings excellent experience to users. Because, the signal receiving part of the user terminal in the LTE system has two parts of primary set receiving and diversity receiving, wherein the primary set receiving part: the signal passes through the Antenna of the main set to A Switch (ASM) of the Antenna of the main set, then passes through the duplexer, and finally reaches a Radio Frequency Integrated Circuit (RFIC, i.e. a transceiver); a diversity reception section: the signal passes through the diversity antenna to the diversity antenna switch, then passes through the filter, and finally reaches the transceiver, and the signal receiving function of the user terminal under the LTE system is completed by the diversity antenna and the filter, so that the signal receiving sensitivity of the user terminal under the LTE system is high, and the communication quality is good. However, Voice over LTE (VoLTE) based on IP Multimedia Subsystem (IMS) is still not mature and coverage of LTE is not high, so Global System for mobile Communication (GSM) still plays an important role in Communication systems.
However, the signal receiving part used by the user terminal in the GSM system only has the main set receiving part, and the diversity receiving part is turned off, so that the user terminal cannot receive signals using the diversity receiving part in the GSM system, and can only receive signals through a single channel, which may result in low signal receiving sensitivity of the user terminal in the GSM system, low communication capability in a weak signal environment, poor call quality, and low component utilization rate.
Disclosure of Invention
The embodiment of the invention provides a signal processing method and a signal processing device of a user terminal in a GSM (global system for mobile communications) system, which are used for solving the problem of low signal receiving sensitivity of the user terminal in the GSM system in the prior art.
The embodiment of the invention provides the following specific technical scheme:
a signal receiving method under a GSM system, comprising:
a user terminal receives a first signal through a main set antenna;
the user terminal detects whether the signal intensity of the first signal exceeds a set threshold value, and if not, a diversity antenna switch is turned on;
a user terminal receives a second signal on a preset frequency band for receiving a first signal through a diversity antenna, wherein the first signal and the second signal are from the same transmitting end;
and the user terminal combines the first signal and the second signal to obtain a complete received signal.
Optionally, the receiving, by the user terminal, the first signal through the main set antenna includes:
the user terminal receives a first signal on a preset frequency band through a preset duplexer in a main set antenna, wherein the preset frequency band is any one of the following frequency bands: personal communication service PCS1900, digital cellular system DCS1800, GSM850, GSM 900.
Optionally, the user terminal detects whether the signal strength of the first signal exceeds a set threshold, and if not, opens the diversity antenna, including:
the user terminal processes the first signal through a Digital Signal Processor (DSP) to obtain a processing result;
the user terminal obtains the signal intensity of the first signal based on the processing result;
and the user terminal compares the signal intensity of the first signal with a preset threshold value, detects whether the signal intensity of the first signal exceeds the set threshold value, and opens the diversity antenna if the signal intensity of the first signal does not exceed the set threshold value.
Optionally, the receiving, by the user terminal, the second signal at the preset frequency band where the first signal is received through the diversity antenna includes:
the user terminal determines a frequency band identifier corresponding to a preset frequency band in a non-GSM system based on the preset frequency band and a frequency band mapping relation between a GSM system and the non-GSM system;
the user terminal selects a preset filter corresponding to the frequency band identifier from the diversity antenna based on the frequency band identifier;
and the user terminal receives the second signal on the preset frequency band through the preset filter.
Optionally, the user terminal combines the first signal and the second signal by using the following formula to obtain a complete received signal, including:
wherein R represents the signal-to-noise ratio of the combined signal, S1/N1 represents the signal-to-noise ratio of the first signal, and a1 represents the weighting coefficient of the first signal; S2/N2 represents the signal-to-noise ratio of the second signal, and a2 represents the weighting coefficient of the second signal.
A signal processing apparatus by which a user terminal performs signal reception under a GSM system, comprising:
the detection unit is used for detecting whether the signal intensity of a first signal received by the user terminal through the main set antenna exceeds a set threshold value, and if not, the diversity antenna switch is turned on;
a receiving unit, configured to receive, by a user terminal, a second signal over a preset frequency band in which the first signal is received through the diversity antenna, where the first signal and the second signal are from a same transmitting end;
and the merging unit is used for the user terminal to merge the first signal and the second signal to obtain a complete received signal.
Optionally, when the user terminal receives the first signal through the main set antenna in the GSM system, the receiving unit is configured to:
the user terminal receives the first signal on a preset frequency band through a preset duplexer in the main set antenna, wherein the preset frequency band is any one of the following frequency bands: PCS1900, DCS1800, GSM850, GSM 900.
Optionally, when detecting whether the signal strength of the first signal received by the user terminal through the main set antenna exceeds a set threshold, the determining unit is configured to:
the user terminal processes the first signal through a Digital Signal Processor (DSP) to obtain a processing result;
the user terminal obtains the signal intensity of the first signal based on the processing result;
the user terminal compares the signal intensity of the first signal with a set threshold value, detects whether the signal intensity of the first signal exceeds the set threshold value, and if not, the diversity antenna switch is opened.
Optionally, when the user terminal receives the second signal through the diversity antenna in the preset frequency band for receiving the first signal, the receiving unit is configured to:
the user terminal determines a frequency band identifier corresponding to the preset frequency band in the non-GSM system based on the preset frequency band and a frequency band mapping relation between the GSM system and the non-GSM system;
the user terminal selects a preset filter corresponding to the frequency band identifier from the diversity antenna based on the frequency band identifier;
and the user terminal receives a second signal on a preset frequency band through the preset filter.
Optionally, the user terminal combines the first signal and the second signal by using the following formula, and when a complete received signal is obtained, the combining unit is configured to:
wherein, R represents the signal-to-noise ratio of the combined signal, S1/N1 represents the signal-to-noise ratio of the first signal, a1 represents the weighting coefficient of the first signal; S2/N2 represents the signal-to-noise ratio of the second signal, and a2 represents the weighting coefficient of the second signal.
In summary, in the embodiment of the present invention, in the process of receiving a signal by a user terminal in a GSM system, the user terminal detects whether the signal strength of a first signal received through a main set antenna exceeds a set threshold, if not, a diversity antenna switch is turned on, the user terminal receives a second signal on a preset frequency band for receiving the first signal through the diversity antenna, and the user terminal combines the first signal and the second signal to obtain a complete received signal. Therefore, the user terminal only needs to use the main set antenna to receive signals in a better signal environment, when the signals are detected to be weaker, the diversity antenna switch is immediately turned on, the signals sent by the same sending end are simultaneously received by the main set antenna and the main set antenna in the same frequency band, and the signals received by the main set antenna and the signals received by the diversity antenna are combined, so that the signal receiving sensitivity of the user terminal in a GSM system is effectively improved, the communication capacity and the communication quality of the user terminal in a weak signal environment are enhanced, and the utilization rate of components is improved.
Drawings
Fig. 1 is a structural component of a signal receiving part of a user terminal in an LTE system according to an embodiment of the present invention;
fig. 2 is a flowchart of a user terminal receiving signals by using diversity antennas in a GSM system according to an embodiment of the present invention;
fig. 3 is a diagram of a signal processing apparatus of a user terminal in a GSM system according to an embodiment of the present invention.
Detailed Description
In order to improve the signal receiving sensitivity of a user terminal under a Global System for mobile Communication (GSM) System and improve the Communication quality, a new signal receiving method is designed, and the method comprises the following steps: in the GSM system, a user terminal receives signals using diversity antennas in non-GSM systems and combines the signals with a main set of signals.
Preferred embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, a user terminal is distributed with a main set antenna and a diversity antenna, and in the prior art, when the user terminal operates in a GSM system, signals can be received through the main set antenna, and when the user terminal operates in a non-GSM system (e.g., an LTE system, a WCDMA system), signals can be received through the main set antenna and the diversity antenna.
Referring to fig. 1, in the embodiment of the present invention, a non-GSM system is described as an example of an LTE system. In the user terminal, duplexers connected to the main diversity antenna are LTE Band2, LTE Band3, LTE Band5, and LTE Band8, respectively, and filters connected to the diversity antenna are LTE Band2, LTE Band3, LTE Band5, and LTE Band8, respectively.
Personal Communication Services (PCS) 1900, Digital Cellular Systems (DCS) 1800, GSM850, and GSM900 frequency bands under the GSM System correspond to Band2, Band3, Band5, and Band8 frequency bands under the LTE System one to one. Based on this point, in the embodiment of the present invention, in the GSM system, the user terminal may turn on the diversity antenna to receive the signal, respectively receive the first signal through the main set antenna and the second signal through the diversity antenna in the same frequency band, and then perform signal combining.
Specifically, referring to fig. 2, in the embodiment of the present invention, a detailed flow of the user terminal receiving signals in the GSM system is as follows:
step 201: the user terminal is self-checked after being powered on, detects that the signal coverage of the GSM system exists around the user terminal, and determines to work in the GSM system.
Specifically, in executing step 201, there are two cases:
the first case is: the subscriber terminal is configured by the subscriber to operate only in the GSM system (e.g., the subscriber turns off the 4G switch on the subscriber terminal).
The second case is: the user terminal is in an environment where only GSM signal coverage exists and thus can only operate in the GSM system.
Step 202: the user terminal completes automatic registration in the GSM system and establishes connection.
Step 203: the user terminal receives signals under the GSM system.
Specifically, the user terminal receives the signal through the single path of the main set antenna in the GSM system, and the signal passes through the main set antenna to the main set Antenna Switch (ASM), then through the duplexer, and finally reaches the transceiver. The user terminal main set antenna can receive signals by using a duplexer in any one of the following frequency bands under a GSM system: PCS1900, DCS1800, GSM850, GSM 900.
Step 204: the user terminal receives a first Signal in a preset frequency band through a main set antenna under a GSM system, and processes the first Signal through a Digital Signal Processor (DSP).
The preset frequency band is a frequency band to which the user terminal can be connected by configuring a General Purpose Input Output (GPIO) or a Mobile Industry Processor Interface (MIPI), where the preset frequency band is any one of the following frequency bands: PCS1900, DCS1800, GSM850, GSM 900.
Of course, in this embodiment, only the first signal is taken as an example for description, and if the user terminal can receive multiple signals synchronously through the main set antenna, the user terminal may also operate on each frequency band simultaneously.
For example, the user terminal receives the first signal through a preset duplexer operating in a preset frequency band in the main set antenna, where the preset frequency band is any one of the following frequency bands: PCS1900, DCS1800, GSM850, GSM 900.
And the user terminal processes the first signal received by the main set antenna through a Digital Signal Processor (DSP) and determines the signal strength of the first signal.
Step 205: the user terminal judges whether the signal intensity of the first signal is not higher than a set threshold value according to the DSP processing result, if so, the step 206 is executed; otherwise, step 207 is performed.
Step 206: the user terminal judges that the signal strength of a first signal received from the main set antenna is not higher than a set threshold (such as less than or equal to-102 dbm), the user terminal starts the diversity antenna, and receives a second signal on a preset frequency band for receiving the first signal, wherein the first signal and the second signal come from the same transmitting end.
Specifically, when the user terminal determines that the signal strength of the first signal received by the main set antenna is not higher than a set threshold, it determines that the current signal quality is poor, and therefore, the signal gain needs to be increased, and then, the user terminal needs to turn on a diversity antenna switch at this time; on the contrary, if the user terminal determines that the current signal quality is better when the signal strength of the first signal received by the main set antenna is higher than the set threshold, the diversity antenna switch does not need to be turned on or turned off.
Then, the user terminal determines a frequency band identifier corresponding to the preset frequency band in the LTE system based on the preset frequency band and a frequency band mapping relation between the GSM system and the LTE system; then, the user terminal selects a preset filter corresponding to the frequency band identifier from the diversity antenna based on the frequency band identifier; and finally, the user terminal receives a second signal on a preset frequency band through the preset filter, wherein the first signal received by the main set antenna and the second signal received by the diversity antenna come from the same transmitting end.
For example: assuming that the preset frequency Band is DCS1800, the user terminal receives a first signal at DCS1800 in the GSM system, and determines that the signal strength of the first signal is not higher than a set threshold, then based on the frequency Band mapping relationship between the GSM system and the LTE system, the user terminal determines that the frequency Band corresponding to DCS1800 is identified as Band3 in the LTE system, that is, DCS1800 and Band3 operate on the same frequency Band, then the user terminal opens a diversity receiving antenna, and receives a second signal on Band3 through an LTE Band3 filter operating on Band 3.
Since DCS1800 and Band3 operate on the same frequency Band, the first signal and the second signal received at two locations, respectively, can be combined.
Another example is: assuming that the preset frequency Band is GSM850, the user terminal receives a first signal at GSM850 in the GSM system, and determines that the signal strength of the first signal is not higher than the set threshold, then based on the frequency Band mapping relationship between the GSM system and the LTE system, the user terminal determines that the frequency Band corresponding to GSM850 in the LTE system is denoted as Band5, that is, GSM850 and Band5 operate on the same frequency Band, then the user terminal opens the diversity receiving antenna, and receives a second signal on Band5 through the LTE Band5 filter operating on Band 5.
Since GSM850 and Band5 operate on the same frequency Band, the first and second signals received at the two locations, respectively, can be combined.
Step 207: the ue determines that the signal strength of the first signal received from the main set antenna is higher than a predetermined threshold (e.g., > -102dbm), and determines that the current signal quality is better, then the ue does not need to turn on the diversity antenna, continues to use the main set antenna to receive the signal, and then performs step 209.
Step 208: the user terminal adopts the following formula to carry out signal combination on the first signal received by the main set antenna and the second signal received by the diversity antenna, and obtains a complete received signal.
In the embodiment of the present invention, the user terminal combines the first signal and the second signal to obtain the complete received signal, which means that the signal-to-noise ratio of the first signal and the signal-to-noise ratio of the second signal are combined to obtain the complete signal-to-noise ratio of the received signal. The signal-to-noise ratio refers to the ratio of the signal power to the noise power of a signal, the signal-to-noise ratio can represent the strength of the signal, and if the signal-to-noise ratio is large, the signal is strong; therefore, in this embodiment, when the signals are combined, the signal-to-noise ratio of the signal at each stage is used to represent the signal at the corresponding stage.
Specifically, in this embodiment, the combined complete received signal may be calculated by using the following formula (for example only):
wherein R represents the signal-to-noise ratio of the combined signal, S1/N1 represents the signal-to-noise ratio of the first signal, and a1 represents the weighting coefficient of the first signal; S2/N2 represents the signal-to-noise ratio of the second signal, and a2 represents the weighting coefficient of the second signal; s1 represents the signal power of the first signal, N1 represents the noise power of the first signal; s2 denotes the signal power of the second signal, and N2 denotes the noise power of the second signal.
When the signal-to-noise ratio S1/N1 of the first signal is greater than the signal-to-noise ratio S2/N2 of the second signal, the weighting coefficient a1 of the first signal is greater than the weighting coefficient a2 of the second signal; when the signal-to-noise ratio S1/N1 of the first signal is smaller than the signal-to-noise ratio S2/N2 of the second signal, the weighting coefficient a1 of the first signal is smaller than the weighting coefficient a2 of the second signal, and of course, the specific values of a1 and a2 may be flexibly set according to the actual application environment, and are not described herein again.
Step 209: the user terminal completes signal reception under the GSM system.
Referring to fig. 3, in an embodiment of the present invention, a signal processing apparatus in a GSM system, where a user terminal receives signals in the GSM system, includes at least a detecting unit 30, a receiving unit 31, and a combining unit 32, where,
a detecting unit 30, configured to detect whether a signal strength of a first signal received by a user terminal through a main set antenna exceeds a set threshold, and if not, turn on a diversity antenna switch; if so, the diversity antenna switch is not turned on or off.
A receiving unit 311, configured to receive, by a user terminal, a second signal over a preset frequency band for receiving the first signal through the diversity antenna, where the first signal and the second signal are from the same transmitting end;
a combining unit 32, configured to combine the first signal and the second signal by the user terminal, so as to obtain a complete received signal.
Optionally, when the user terminal receives the first signal through the main set antenna, the receiving unit 310 is configured to:
the user terminal receives the first signal on a preset frequency band through a preset duplexer in the main set antenna, wherein the preset frequency band is any one of the following frequency bands: PCS1900, DCS1800, GSM850, GSM 900.
Optionally, the detecting unit 30 is configured to detect whether the signal strength of the first signal received by the user terminal through the main set antenna exceeds a set threshold:
the user terminal processes the first signal through a Digital Signal Processor (DSP) to obtain a processing result;
the user terminal obtains the signal intensity of the first signal based on the processing result;
the user terminal compares the signal intensity of the first signal with a set threshold value, detects whether the signal intensity of the first signal exceeds the set threshold value, and if not, the diversity antenna switch is opened.
Optionally, when the user terminal receives the second signal on the preset frequency band where the first signal is received through the diversity antenna, the receiving unit 311 is configured to:
the user terminal determines a frequency band identifier corresponding to the preset frequency band in the non-GSM system based on the preset frequency band and a frequency band mapping relation between the GSM system and the non-GSM system;
the user terminal selects a preset filter corresponding to the frequency band identifier from the diversity antenna based on the frequency band identifier;
and the user terminal receives a second signal on a preset frequency band through the preset filter.
Optionally, when the user terminal combines the first signal and the second signal by using the following formula to obtain a complete received signal, the combining unit 32 is configured to:
wherein, R represents the signal-to-noise ratio of the combined signal, S1/N1 represents the signal-to-noise ratio of the first signal, a1 represents the weighting coefficient of the first signal; S2/N2 represents the signal-to-noise ratio of the second signal, and a2 represents the weighting coefficient of the second signal.
In summary, in the embodiment of the present invention, in the process of receiving a signal by a user terminal in a GSM system, when the user terminal determines that the signal strength of a first signal received by a main set antenna does not exceed a set threshold, a diversity antenna switch is turned on, the user terminal receives a second signal in a preset frequency band for receiving the first signal through the diversity antenna, and the user terminal combines the first signal and the second signal to obtain a complete received signal. Therefore, the user terminal only needs to use the main set antenna to receive signals in a better signal environment, when the signals are detected to be weaker, the diversity antenna switch is immediately turned on, the signals sent by the same sending end are simultaneously received by the main set antenna and the main set antenna in the same frequency band, and the signals received by the main set antenna and the signals received by the diversity antenna are combined, so that the signal receiving sensitivity of the user terminal in a GSM system is effectively improved, the communication capacity and the communication quality of the user terminal in a weak signal environment are enhanced, and the utilization rate of components is improved.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.
Claims (8)
1. A signal processing method in a GSM system, comprising:
a user terminal receives a first signal through a main set antenna;
the user terminal detects whether the signal intensity of the first signal exceeds a set threshold value, and if not, a diversity antenna switch is turned on;
a user terminal receives a second signal on a preset frequency band for receiving the first signal through the diversity antenna, wherein the first signal and the second signal are from the same transmitting end;
the user terminal combines the first signal and the second signal to obtain a complete received signal;
wherein, the user terminal receives the second signal on the preset frequency band for receiving the first signal through the diversity antenna, which comprises: the user terminal determines a frequency band identifier corresponding to the preset frequency band in the non-GSM system based on the preset frequency band and a frequency band mapping relation between the GSM system and the non-GSM system; the user terminal selects a preset filter corresponding to the frequency band identifier from the diversity antenna based on the frequency band identifier; and the user terminal receives a second signal on a preset frequency band through the preset filter.
2. The method of claim 1, wherein the user terminal receives the first signal via a main set of antennas, comprising:
the user terminal receives the first signal on a preset frequency band through a preset duplexer in the main set antenna, wherein the preset frequency band is any one of the following frequency bands: personal communication service PCS1900, digital cellular system DCS1800, GSM850, GSM 900.
3. The method of claim 1, wherein the user terminal detects whether the signal strength of the first signal exceeds a set threshold, and if not, then turns on a diversity antenna, comprising:
the user terminal processes the first signal through a Digital Signal Processor (DSP) to obtain a processing result;
the user terminal obtains the signal strength of the first signal based on the processing result;
and the user terminal compares the signal intensity of the first signal with the preset threshold value, detects whether the signal intensity of the first signal exceeds the set threshold value, and opens the diversity antenna if the signal intensity of the first signal does not exceed the set threshold value.
4. The method of claim 1, wherein the user terminal combines the first signal and the second signal to obtain a complete received signal using the following formula, comprising:
wherein R represents the signal-to-noise ratio of the combined signal, S1/N1 represents the signal-to-noise ratio of the first signal, and a1 represents the weighting coefficient of the first signal; S2/N2 represents the signal-to-noise ratio of the second signal, and a2 represents the weighting coefficient of the second signal.
5. A signal processing apparatus by which a user terminal receives signals in a GSM system, comprising:
the detection unit is used for detecting whether the signal intensity of a first signal received by the user terminal through the main set antenna exceeds a set threshold value, and if not, the diversity antenna switch is turned on;
a receiving unit, configured to receive, by a user terminal, a second signal over a preset frequency band in which the first signal is received through the diversity antenna, where the first signal and the second signal are from a same transmitting end;
a merging unit, configured to merge the first signal and the second signal by the user terminal to obtain a complete received signal;
wherein, when the user terminal receives the second signal on the preset frequency band of the first signal through the diversity antenna, the receiving unit is configured to: the user terminal determines a frequency band identifier corresponding to the preset frequency band in the non-GSM system based on the preset frequency band and a frequency band mapping relation between the GSM system and the non-GSM system; the user terminal selects a preset filter corresponding to the frequency band identifier from the diversity antenna based on the frequency band identifier; and the user terminal receives a second signal on a preset frequency band through the preset filter.
6. The processing apparatus as claimed in claim 5, wherein when the user terminal receives the first signal via the main set antenna, the receiving unit is configured to:
the user terminal receives the first signal on a preset frequency band through a preset duplexer in the main set antenna, wherein the preset frequency band is any one of the following frequency bands: PCS1900, DCS1800, GSM850, GSM 900.
7. The processing apparatus as claimed in claim 5, wherein the detecting unit is configured to detect whether a signal strength of the first signal received by the user terminal through the main set antenna exceeds a set threshold, and if not, turn on the diversity antenna switch, and is configured to:
and the user terminal compares the signal intensity of the first signal with the set threshold value, detects whether the signal intensity of the first signal exceeds the set threshold value, and opens the diversity antenna switch if the signal intensity of the first signal does not exceed the set threshold value.
8. The processing apparatus as claimed in claim 5, wherein when the user terminal combines the first signal and the second signal to obtain the complete received signal, the combining unit is configured to:
wherein R represents the signal-to-noise ratio of the combined signal, S1/N1 represents the signal-to-noise ratio of the first signal, and a1 represents the weighting coefficient of the first signal; S2/N2 represents the signal-to-noise ratio of the second signal, and a2 represents the weighting coefficient of the second signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610737759.7A CN106301518B (en) | 2016-08-26 | 2016-08-26 | Signal processing method and device under GSM system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610737759.7A CN106301518B (en) | 2016-08-26 | 2016-08-26 | Signal processing method and device under GSM system |
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| CN106301518A CN106301518A (en) | 2017-01-04 |
| CN106301518B true CN106301518B (en) | 2020-03-10 |
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| CN107585046A (en) * | 2017-09-06 | 2018-01-16 | 洛阳市质量技术监督检验测试中心 | A kind of packaged type charging pile of grid-connected photovoltaic power generation system |
| CN107645733B (en) * | 2017-10-31 | 2021-06-04 | 北京小米移动软件有限公司 | Communication method, communication apparatus, and storage medium |
| CN107835045B (en) * | 2017-11-16 | 2021-05-28 | 青岛海信移动通信技术股份有限公司 | Intercom signal processing method and circuit of mobile terminal and mobile terminal |
| CN108491061B (en) * | 2018-03-12 | 2020-07-07 | Oppo广东移动通信有限公司 | Processing method and device of radio frequency antenna, storage medium and electronic equipment |
| CN112532292B (en) * | 2020-11-22 | 2021-10-08 | 广州技象科技有限公司 | Receiving mode selection method and device based on signal diversity reception |
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